S-381 is the Futuristic concept which has diamond-shaped wing. The rudder is adopted from Airbus A330 neo to make a more control for the systems. This plane designed to blast off to >2 Mach. The BIG spoiler is use for quick stop. with the powerful engine, this plane can fly on 60.000 ft. That is all I know as a designer. Thank you

screenshots
https://paste.pics/BSWRR

This will show you how thicc is this